The Domadia Group

Thickness: 0.20 ~ 2.00 mm;

Core Material: Non-Alloy Steel, High Grade Steel, Iron Nickel Alloys, Copper, Nickel; Cladding Material: Copper, Nickel, Copper Zinc Alloys, Copper Tin Alloys, Copper Nickel Alloys, High Grade Steels.

By joining different materials with different properties it is possible to manufacture, or even develop deliberately new materials with new properties.

This is a long-established process. About 2,500 years ago the so-called DAMASCUS STEEL BLADES were produced in the Orient. The two steel qualities used in production (soft easily formable iron and hard brittle iron) were joined firmly together by forging. The famous DAMASK PATTERN was achieved by multiple folding, intermediate annealing, and hammering.

Industrial processes for the manufacture of clad materials are cast cladding, hot roll bonding, press bonding, cold roll bonding, and explosion bonding. We have exclusively used cold roll bonding on a large scale since 1984.

Strips out of soft unalloyed steel
Copper-clad: Main application as conductor rails in the electrical industry (automatic circuit breakers, protective motor switches etc.)
Brass-plated: Application as brush holder for electric motors, as coin blanks and plain bearings in combustion engines
Tombac-plated: Cups for bullets
Nickel-plated: Main application as coin blanks

Strips out of stainless steels
Copper-clad: Main application as heat exchanger, cooler
Nickel-plated: Spring elements in lamp production

Special cladding layers
Examples:
CuSn6 on stainless steel as soldering foil
CuZn20Ni5 on nickel as 2 Euro core strip
CuNi25 on nickel as 1 Euro core strip
CuZn20Ni5 out of CuNi25 as medal strip
Nickel on SE-CU as electrode for high-performance spark plugs

Thermostatic bimetal is a laminated composite material that usually consists of two firmly joined metals or metal alloys with different rates of thermal expansion. In case of temperature changes the strips, disks or parts change their shape in a defined way. If this change in shape is suppressed, a setting force is obtained which can be used for a mechanical displacement. By combining it with cladding and intermediate layers certain properties such as electrical resistivity, corrosion resistance etc. can be deliberately influenced. 

Applications

Thermostatic bimetals are established in a wide range of applications other than microelectronics. They are used to control or limit temperature-dependent variables by means of a relatively simple design. Their easy handling as well as their high reliability and low costs are the decisive advantages for their application in:

Electrical engineering

• Protective motor switches
• Automatic circuit breakers
• Automatic time switches
• Transformer safety switches
• Automatic staircase light switches
• Fluorescent lamp starters
• Control devices for irons
• Control devices for hot plates
• Control devices for toasters
• Control devices for ovens
• Thermostats for thermal storage heating stoves
• Inductive coil protections
• Door locking systems

Automotive industry

• Cigarette lighters
• Gasoline level indicators
• Cooling water controllers (fan control)
• Automatic starters
• Seat heating
• Mirror heating
• Brake-power controllers

Measurement technology

• Temperature compensation
• Temperature recorders
• Thermometers
• Clock and timer units

Heat technology

• Heating controllers
• Steam traps
• Exhaust gas valves
• Fire detectors
• Hot-water mixers
• Stove regulators
• Flame protection of gas burners